I remember for the old version with the Dealer witch you could somehow do it in game config files.
Buet regardless of that, you can do it via your video drivers.
For NVIDIA it's: Go to NVIDIA control panel -> 3D Settings -> Manage 3D Settings -> Program Settings tab -> Click "Add" -> select the executable for Under The Witch -> Select "Max Frame Rate" from the list and set it to whatever is comfortable for your hardware, then hit "Apply".
I haven't used AMD in a hot minute, but I'm sure their drivers can let you do the same.